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Dyfyniad Arddull ChicagoSheen, Fulton J. Communism Answers Questions of a Communist. New York: The Paulist press, 1937.
Dyfyniad MLASheen, Fulton J. Communism Answers Questions of a Communist. The Paulist press, 1937.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.